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脉冲多普勒。对匹配滤波后的雷达信号做脉冲多普勒处理，可以得到预设信号的速度信息(The process of Pulse Doppler of radar signal after match filterring)

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PSCAD设计的永磁同步电机，带有说明书，来源于互联网。(PSCAD based permanent magnet synchronous motor, with instructions, from the Internet.)

基于ArcGIS开发平台 是对GDB数据库文件的操作-arcgis, gdb file database operator

实现STM8L152串口3数据的收发，亲测可以正常使用(STM8L152 serial port to achieve 3 data transceiver, pro test can be used normally.)

包含非线性卫星转发器的FDM系统的仿真 仿真一个从卫星到区域数据中心的下行链路（由一组6个载波构成），评估热噪声，交调（IM）失真、由滤波器造成的码间干扰（ISI）以及邻频干扰对下行链路性能的影响。 -Contains the non-linear satellite transponder FDM system simulation simulation of a regional data centers from the satellite to the downlink (from a group of six carrier composition) to assess the thermal noise, intermodulation (IM) distortion, caused by the filter inter-symbol interference (ISI) and adjacent channel interference on the downlink performance.

python qt 快速编程的中文原版使用手册(using qt with pyhton)

一个企业管理系统，包括增删查改，文件上传与下载，值日人员管理等(An enterprise management system, including add, delete, check and modify, file upload and download, on-duty personnel management, etc)

说明：  金蝶专业版14.0.0代文件及注册机，按照说明步骤一步一步走((Kingdee KIS Administration Version V12.1 Kingdee KIS Flagship Version V4.0 Kingdee KIS Business Version V6.1 Kingdee KIS Professional Version V14.0 Quadruple Register))

（1）设计一个“简易计算器”，主要实现判断输入的表达式是否合法将中缀表达式转换成二叉表达式树。后序遍历求出表达式的值。能判断输入的表达式是否合法。 （2）用链式存储存储信息，求值时可以采用递归的思想，对表达式进行后序遍历。 （3）将操作结果保存到外部文件。((1) Design a "simple calculator" to judge whether the input expression is legitimate or not and convert infix expression into binary expression tree. The value of the expression is obtained by post-order traversal. Can judge whether the input expression is legitimate. (2) Store information in chain mode. When evaluating the value, we can use the idea of recursion to carry out post-order traversal of the expression. (3) To save the operation results to external files.)